Methods and apparatuses for transmitting and configuring sidelink data

1. An apparatus for transmitting sidelink data, comprising:

a memory that stores a plurality of instructions; and

a processor coupled to the memory and configured to execute the instructions to:

receive downlink control information comprising a sidelink grant and transmitted by a network device, the downlink control information further indicating at least one piece of destination information to which the sidelink grant is directed, wherein the destination information comprises a hybrid automatic repeat request process identifier; and

transmit initial or retransmission data of a sidelink hybrid automatic repeat request process with an identifier corresponding to the hybrid automatic repeat request process identifier in a sidelink resource indicated by the sidelink grant.

2. The apparatus according to claim 1 , wherein the destination information is contained in the downlink control information.

3. The apparatus according to claim 1 , wherein the destination information is indicated by a resource where the downlink control information is located.

4. The apparatus according to claim 1 , wherein the destination information is indicated by scrambling cyclic redundancy check of the downlink control information by using the destination information.

5. The apparatus according to claim 1 , wherein the destination information is Layer 2 information or information on a layer higher than the Layer 2.

6. The apparatus according to claim 1 , wherein the destination information is Layer 1 information, and the processor is further configured to map the Layer 1 information into at least one piece of Layer 2 information or information on a layer higher than the Layer 2.

7. The apparatus according to claim 1 , wherein the processor is configured to select at least one destination having an identifier in consistence with that of the destination information, and determine a logical channel to which the selected at least one destination corresponds.

8. The apparatus according to claim 1 , wherein the processor is configured to select at least one logical channel with a corresponding destination identifier in consistence with the destination information.

9. The apparatus according to claim 1 , wherein the processor is configured to select at least one logical channel from one or more logical channels having data to be transmitted, and allocate one or more resources indicated by the sidelink grant for the selected at least one logical channel in a descending order of priorities of logical channels.

10. The apparatus according to claim 1 , wherein the sidelink grant is further associated with at least one of the following: a subcarrier spacing, a physical sidelink shared channel transmission length, or carrier information.

11. The apparatus according to claim 10 , wherein a subcarrier spacing configured for a logical channel comprises the subcarrier spacing associated with the sidelink grant; and/or

a physical sidelink shared channel transmission length configured for the logical channel is greater than or equal to the physical sidelink shared channel transmission length associated with the sidelink grant; and/or

an allowed carrier configured for the logical channel comprises the carrier information associated with the sidelink grant.

12. The apparatus according to claim 1 , wherein the processor is further configured to transmit a scheduling request to the network device when the sidelink data are needed to be transmitted; receive control information comprising an uplink grant transmitted by the network device; and transmit a sidelink buffer status report to the network device according to the uplink grant to request for the sidelink grant.

13. The apparatus according to claim 12 , wherein the sidelink buffer status report comprises at least one link identifier.

14. An apparatus for configuring sidelink data, comprising:

a memory that stores a plurality of instructions; and

a processor coupled to the memory and configured to execute the instructions to:

transmit downlink control information comprising a sidelink grant to a terminal equipment, the downlink control information further indicating at least one piece of destination information to which the sidelink grant is directed, wherein the destination information comprises a hybrid automatic repeat request process identifier, the hybrid automatic repeat request process identifier being used by the terminal equipment to transmit initial or retransmission data of a sidelink hybrid automatic repeat request process with an identifier corresponding to the hybrid automatic repeat request process identifier in a sidelink resource indicated by the sidelink grant.

15. The apparatus according to claim 14 , wherein the processor is further configured to receive a scheduling request transmitted by the terminal equipment;

transmit control information comprising an uplink grant to the terminal equipment; and

receive a sidelink buffer status report requesting the sidelink grant transmitted by the terminal equipment.

16. A method for requesting sidelink resource, comprising:

transmitting a scheduling request by a terminal equipment to a network device when sidelink data are needed to be transmitted, wherein the scheduling request corresponds to at least one sidelink logical channel; and

receiving a radio resource control reconfiguration message by the terminal equipment, the radio resource control reconfiguration message comprising sidelink related information which comprises logical channel(s) and radio bearer(s).

17. The method according to claim 16 , wherein a correspondence between configuration of the scheduling request and the at least one sidelink logical channel is preconfigured by the network device, or is predefined.

18. The method according to claim 16 , wherein the method further comprises:

transmitting a radio resource control message by the terminal equipment, the radio resource control message comprising sidelink UE information which comprises quality of service (QoS) characteristics of interested V2X service(s).